Gorman-Rupp Pumps S3B65-E6 460/3 861279 thru 1217130 - Manual (Page 25)

S SERIES PUMPS OM−04151
PAGE B − 19 INSTALLATION
When necessary to change or connect the pump
power cable to the control box, make certain the in-
coming power is OFF and LOCKED OUT, Make
certain the control box is PROPERLY GROUNDED
and that the electrical data on the control matches
the motor name plate data.
Connect the pump power cable to the control box
as shown in the wiring diagrams in the control box
manual. Use conduit or cable clamps to secure the
power cable to the control box. Make certain that
all connections are tight and that cable entry points
are rainproof.
NOTE
The power cable furnished with the pump includes
three electrical conductors (white, red, and black),
two grounding conductors (green) and one ground
check conductor (yellow). The yellow ground
check lead is used in conjunction with customer-
supplied ground monitoring equipment. If this
equipment is not used, the yellow lead should be
used as a ground conductor.
Control Box Specifications
Any control box used to operate the
pump must be approved by the Gor-
man-Rupp Company for the application.
Motor Cable Grounding Test
Do not connect the pump control cable
to the control box or incoming voltage
before verifying the pump ground;
otherwise, personnel will be exposed to
serious injury or death.
Using a volt-ohm meter, connect one lead to the
motor cable green/yellow ground lead. Connect
the other lead to an uninsulated point on the pump
body. The test circuit should close.
If the test circuit does not close, there is a defect in
the cable or motor which must be corrected.
Control Box Connections
This pump is shipped completely wired for the volt-
age shown on the name plate, and is ready for op-
eration through an approved control box.
Ground and wire the control box in accordance
with the instructions accompanying it.
NOTE
For reference, internal motor wiring connections
are shown in the Maintenance and Repair manual.
Liquid Level Devices
The standard pump is not furnished with a means
to automatically regulate liquid level. However, the
pump may be controlled to perform filling or dewa-
tering functions by using either of the following op-
tional sensing devices (see Figure B−4):
S
Diaphragm Type: two fixed-position sen-
sors (upper and lower) each contain a dia-
phragm which flexes with changes in liquid
level, thus activating an enclosed miniature
switch.
S
Bulb (Float) Type: a bulb raises or lowers
(floats) with the liquid level, thus activating
an enclosed miniature switch.
Models under 6 horsepower require an additional
control box to incorporate liquid level controls. For
models over 6 horsepower, the circuitry may be
prewired as a factory option, or easily added to the
standard control box in the field by qualified per-
sonnel. The unit is complete except for the remote
float switches. For installation and operation, see
the detailed instructions included with the optional
package.
Liquid level devices must be positioned far
enough apart to allow 10 minutes between
starts. If the pump motor cycles more than
6 starts per hour, it will over-heat, resulting
in damage to the motor windings or control
box components.